Datasheet

The AUX socket connects to the Audio/Video jack’s sleeve connection. This connection can be monitored

for mic output from common cell phone earbuds, or transmit composite video from the breadboard to a

TRRS connector to an RCA adapter’s video channel. See 14) Audio/Video Jack, p. 5 for more information.

12) Power Switch

The power switch has 3 settings:

• 0 — off

• 1 — power to the microcontroller system, including P0-P15 via the I/O pin access socket

• 2 — power to the microcontroller system and servo ports; see 4) Servo Headers. p. 3.

13) Reset Button

Use this button to restart the Propeller microcontroller’s program. Press and hold to keep the

microcontroller in reset. Press and release to reset, load and run the program in EEPROM.

Pressing the reset button also drives the DO pin low on the wireless programming and communications

socket. This may be useful for configuring a Digi XBee S6B Wi-Fi module in certain applications.

14) Audio/Video Jack

The TRRS (tip, ring 1, ring 2, sleeve) A/V (audio/video) jack provides audio output to 1/8” stereo

headphone or speaker plugs. Propeller I/O pins P26 (left channel = tip) and P27 (right channel = ring or

ring 1) are hardwired to low-pass filters, amplifiers and coupling capacitors that can drive headphones,

ear-buds, speakers, or line level inputs. It is compatible with the Veho 360 speaker from Parallax (item

#900-00018).

A third signal (sleeve) connects to the AUX socket on the wireless access and communication header.

This can be used to connect the microphone and controls on a CTIA-compatible headset (cell phone

earbuds + mic for example) to the breadboard. It can also be used for connecting baseband video from

the breadboard to a TRRS to RCA adapter’s video channel.

15) USB Port

The USB port can perform the following functions:

• Load programs from a computer into the Propeller microcontroller.

• Support serial-over-USB communications to a terminal program on a computer.

• Supply 5 V power to the Propeller Activity Board WX from a computer’s USB port. For power, the

USB Port is input current limited to between 420 mA and 540 mA. When using the Propeller

Activity Board WX with an external USB hub, be sure to use a powered hub when not providing

power from the 2.1 mm power jack.

On connecting to a USB host, or programming via USB, the Propeller Activity Board WX automatically

selects the USB port for serial communications on Propeller I/O pins P30 and P31. To override the

selection, see 11) WX Wireless Access & Communication Header, p. 4.

NOTE: When overriding the selection, to select the Wireless Communication Module Socket, the override

will disable programming and communications from the USB port.

16) USB Activity LEDs

When the USB host transmits data to the Propeller microcontroller, the blue TX→P31 LED lights to

indicate activity. When the Propeller microcontroller transmits data to the USB host, the red RX←P31

LED lights to indicate activity.